BOSTON, Nov. 18 /PRNewswire-FirstCall/ — At the Greenbuild International
Conference and Expo in Boston, Mass., Owens Corning (NYSE: OC) announced it
has increased the certified recycled content in its flagship PINK
Fiberglas(TM) insulation to a minimum of 40 percent. At this level of recycled
content, the amount of waste glass diverted from landfills could form a
two-lane glass highway that extends 1.3 times around the world(1). The
certification, supplied by leading, independent third-party certifier
Scientific Certification Systems (SCS), demonstrates a five percent increase
over its prior level and maintains the product line’s status as the fiberglass
insulation with the highest level of certified recycled content in North
America.

In addition to the environmental benefits of utilizing post-industrial and
post-consumer waste, the use of recycled content in PINK Fiberglas(TM)
insulation also helps reduce Owens Corning’s energy use and C02 emissions by
nearly 13 percent. Manufacturing fiberglass with recycled glass requires
significantly less energy.

“Glass takes over a million years to break down and for every piece kept
out of a landfill, we not only reduce waste, but put the glass to work as
insulation to help increase energy efficiency in the built environment,” said
Frank O’Brien-Bernini, chief sustainability officer for Owens Corning.
“Increasing the recycled content of our products also enables us to reduce the
energy intensity of our manufacturing process, which fulfills our company’s
commitment to greening its products and processes.”

As a result of these efforts, Owens Corning is one of the largest users of
recycled glass in the world. To continue to help the market find additional
sources of recycled glass, Owens Corning is leading initiatives with regional
recyclers and processors to invest in technologies that will reduce the amount
of glass sent to landfills, either because no local recycling programs exist
or due to technical limitations in recycling different types and colors of
glass. One such program involves Strategic Materials Inc., a Texas-based
processor of scrap glass collected from a diverse range of sources including
new curbside recycling programs. Once construction is completed, the glass the
company will recycle at plants in Texas and Georgia will keep approximately
12,500 tons of glass per month from going to a landfill, and be reused in
products including Owens Corning insulation.

“The leadership demonstrated by companies such as Owens Corning to
continually increase the content of recycled material in their products is
actually driving the creation of local and regional recycling programs,” said
Curt Bucey, president of Strategic Materials Inc. “Glass recycling is very
effective in reducing the need for natural resources and minimizing landfill
waste. It’s also key to reducing energy use and decreasing harmful emissions,
and should be a part of our nation’s energy policy.”

SCS approved the certification of PINK Fiberglas(TM) insulation, as well
as the company’s commercial fiberglass products, after a rigorous four-step
process that included a comprehensive audit of the company’s claims, including
visits to manufacturing facilities to see the process and interview plant
personnel. This recognition by SCS assures building professionals using Owens
Corning fiberglass insulation of the recycled content in order to help achieve
LEED(R) certification and meet other green building guidelines.

About Owens Corning

Owens Corning (NYSE: OC) is a leading global producer of residential and
commercial building materials, glass fiber reinforcements and engineered
materials for composite systems. A Fortune 500 company for 54 consecutive
years, Owens Corning is committed to driving sustainability through delivering
solutions, transforming markets and enhancing lives. Founded in 1938, Owens
Corning is a market-leading innovator of glass fiber technology with sales of
$5 billion in 2007 and 18,000 employees in 26 countries on five continents.
Additional information is available at http://www.owenscorning.com.

About Strategic Materials, Inc.

Strategic Materials is the largest glass processor in North America
selling approximately 1.3 million tons of glass cullet each year from both
post-industrial and post-consumer scrap glass sources, including residential
collection programs to bottle and plate glass manufacturers. It operates a
network of 31 processing plants and aggregation depots across the U.S.,
Canada, and Mexico. Additional information is available athttp://www.strategicmaterials.com.

(1) Based on the quantity of Owens Corning PINK Fiberglas(TM) insulation
produced in 2007.
The color PINK is a registered trademark of Owens Corning.
Copyright (C) 2008 Owens Corning